Introduction

Introduction

08.24.08 (12:13 pm)   [edit]
Hypnosis is a natural psychological process in which critical thinking faculties of the mind are bypassed and a type of selective thinking and perception is established. Although some individuals experience an increase in suggestibility and subjective feelings of an altered state of consciousness, this is not true for everyone. In fact, some supposed hypnotic indicators and subjective changes can be achieved without relaxation or a lengthy induction by means of simple suggestion or waking hypnosis, a fact that increases the controversy and misunderstandings around hypnosis and the hypnotic state. History Hypnosis has a long history from ancient times to the present. Interest in hypnosis is marked with great enthusiastic interest to troughs of total neglect. Many of its techniques were used by early peoples. Its current uses have, for the most part been scientifically studied by a host of both practitioners and researchers. Many names dot the landscape of hypnosis' history from Franz Anton Mesmer to Milton Erickson. For a more complete history see the reference section below. Theories of Hypnosis Some theories of hypnosis attempt to describe hypnotic phenomena in terms of brain activity while others concentrate more on the phenomenological experience. In either case, a fundamental distinction is between "state" and "non-state" theories of hypnosis. State theorists believe that an altered state of consciousness is a core part of hypnosis, whereas non-state theorists believe that more mundane psychological processes such as focused attention and expectation are sufficient to explain hypnotic phenomena. The precise definition of what constitutes an altered state of consciousness is a matter of some debate. Although many people who are hypnotized describe their experience as "altered" it is difficult to use these terms in the absence of a prior definition. The American Psychological Association remains neutral in the argument between 'state' and 'non-state' theorists. However, this controversy may be decreasing as modern brain-imaging techniques offer hope for an increased understanding of the nature of hypnosis, and as the value of both perspectives is increasingly recognized. The following theories have been presented from highly regarded individuals/groups: Alpha- and Theta-state theories Through data collected by Electroencephalography (EEGs), four major brain-wave patterns—frequency of electrical impulses firing from the brain—have been identified. The Beta state (alert/working) is defined as 14–32 cycles per second (CPS), the Alpha state (relaxed/reflecting) as the 7–14 CPS, the Theta state (drowsy) as 4–7 CPS, and the Delta state (sleeping/dreaming/deep sleep) as approximately 3–5 CPS. One physiological definition of hypnosis states that the brainwave level necessary to work on issues such as stopping smoking, weight management, reduction of phobias, sports improvement, etc., is the alpha state. The alpha state is commonly associated with closing one's eyes, relaxation, and daydreaming. Another physiological definition states that the theta state is required for therapeutic change. The theta state is associated with hypnosis for surgery, hypnoanesthesia (the use of hypnosis to numb sensation of pain), and hypnoanalgesia (the use of hypnosis to decrease sensitivity to pain), which occur more readily in the theta and delta states. Anesthetics, sedatives and hypnotics disrupt neuronal synchrony, thought to underlie theta waves, in both humans and animals, as well as in simple neuronal circuits. It should be noted that hypnoanalgesia of the skin is a common test for somnambulism. Arm and body catalepsy are one of a few tests done to determine readiness for these surgical applications. However, it is important to reflect upon the fact that both arm and body catalepsy can be induced in normal non-hypnotized subjects. Indeed, arm catalepsy is a standard stage-hypnotist's test of susceptibility. Moreover, normal, non-hypnotized subjects can be found in any of these states of cortical arousal without also displaying any of the behavior, traits or the enhanced suggestibility associated with being hypnotized. Reading, watching movies, and meditating may be also forms of hypnosis.